高值与低值结合的中性点电阻接地方式优越性  

The Advantages of Neutral Point Resistance Grounding with Combination of High and Low Values

作　　者：王雪松 

机构地区：[1]通化钢铁股份有限公司动力厂,吉林通化134000

出　　处：《冶金动力》2013年第11期13-13,18,共2页Metallurgical Power

摘　　要：电网中性点采用经电阻接地方式是提高可靠性的重要途径,为防止接地时故障电流烧损故障点和瞬间接地时保护误动,以负荷类别划分,即重要负荷采用高值电阻接地,可在单相接地时,持续运行2 h,避免突然断电造成的损失;次要负荷采用低值电阻接地,快速切出故障。Adopting resistance grounding at neutral points of power grid is an important way to improve reliability and prevent false protection when fault current burning fault points at instant grounding. To classify by load types, i.e. important loads using high resistance grounding, can constantly operate 2 hours at single-phase grounding to avoid losses caused by sudden power cutoff. Secondary loads use low resistance grounding to rapidly cut out of faults.

关 键 词：电阻接地 高值 低值 结合 可靠性 

分 类 号：TM54[电气工程—电器]